diff --git a/spec/unit/virtus/typecast/string/class_methods/to_boolean_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_boolean_spec.rb
index ec0d6376..68250f49 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_boolean_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_boolean_spec.rb
@@ -1,24 +1,29 @@
 require 'spec_helper'
 
 describe Virtus::Typecast::String, '.to_boolean' do
-  subject { described_class.to_boolean(string) }
+  subject { object.to_boolean(string) }
 
-  described_class::TRUE_VALUES.each do |value|
+  let(:object) { described_class }
+
+  %w[ 1 t true T TRUE ].each do |value|
     context "with #{value.inspect}" do
       let(:string) { value }
+
       it { should be(true) }
     end
   end
 
-  described_class::FALSE_VALUES.each do |value|
+  %w[ 0 f false F FALSE ].each do |value|
     context "with #{value.inspect}" do
       let(:string) { value }
+
       it { should be(false) }
     end
   end
 
-  context 'with an unknown string' do
-    let(:string) { 'something' }
-    it { should == string }
+  context 'with an invalid boolean string' do
+    let(:string) { 'non-boolean' }
+
+    it { should equal(string) }
   end
 end
diff --git a/spec/unit/virtus/typecast/string/class_methods/to_date_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_date_spec.rb
index c20953f2..1e4319d7 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_date_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_date_spec.rb
@@ -1,7 +1,9 @@
 require 'spec_helper'
 
 describe Virtus::Typecast::String, '.to_date' do
-  subject { described_class.to_date(string) }
+  subject { object.to_date(string) }
+
+  let(:object) { described_class }
 
   context 'with a valid date string' do
     let(:string) { "July, 22th, 2011" }
@@ -15,6 +17,7 @@
 
   context 'with an invalid date string' do
     let(:string) { 'non-date' }
-    it { should == string }
+
+    it { should equal(string) }
   end
 end
diff --git a/spec/unit/virtus/typecast/string/class_methods/to_datetime_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_datetime_spec.rb
index 71024c96..62ec6848 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_datetime_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_datetime_spec.rb
@@ -1,7 +1,9 @@
 require 'spec_helper'
 
 describe Virtus::Typecast::String, '.to_datetime' do
-  subject { described_class.to_datetime(string) }
+  subject { object.to_datetime(string) }
+
+  let(:object) { described_class }
 
   shared_examples_for 'a correct datetime object' do
     it { should be_instance_of(DateTime) }
@@ -43,6 +45,6 @@
   context 'with an invalid date time string' do
     let(:string) { 'non-datetime' }
 
-    it { should == string }
+    it { should equal(string) }
   end
 end
diff --git a/spec/unit/virtus/typecast/string/class_methods/to_decimal_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_decimal_spec.rb
index f2074408..95a2a9ee 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_decimal_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_decimal_spec.rb
@@ -1,10 +1,23 @@
 require 'spec_helper'
 
 describe Virtus::Typecast::String, '.to_decimal' do
-  subject { described_class.to_decimal(string) }
+  subject { object.to_decimal(string) }
 
-  let(:string)  { '1.0' }
-  let(:decimal) { BigDecimal('1.0') }
+  let(:object) { described_class }
 
-  it { should == decimal }
+  { '1' => BigDecimal('1.0'), '1.0' => BigDecimal('1.0'), '.1' => BigDecimal('0.1') }.each do |value, expected|
+    context "with #{value.inspect}" do
+      let(:string) { value }
+
+      it { should be_instance_of(BigDecimal) }
+
+      it { should eql(expected) }
+    end
+  end
+
+  context 'with an invalid decimal string' do
+    let(:string) { 'non-decimal' }
+
+    it { should equal(string) }
+  end
 end
diff --git a/spec/unit/virtus/typecast/string/class_methods/to_float_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_float_spec.rb
index c8389d4c..6cbe0cf9 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_float_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_float_spec.rb
@@ -3,8 +3,19 @@
 describe Virtus::Typecast::String, '.to_float' do
   subject { described_class.to_float(string) }
 
-  let(:string) { '1' }
-  let(:float)  { 1.0 }
+  { '1' => 1.0, '1.0' => 1.0, '.1' => 0.1 }.each do |value, expected|
+    context "with #{value.inspect}" do
+      let(:string) { value }
 
-  it { should == float }
+      it { should be_instance_of(Float) }
+
+      it { should eql(expected) }
+    end
+  end
+
+  context 'with an invalid float string' do
+    let(:string) { 'non-float' }
+
+    it { should equal(string) }
+  end
 end
diff --git a/spec/unit/virtus/typecast/string/class_methods/to_integer_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_integer_spec.rb
index c212c602..722197ce 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_integer_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_integer_spec.rb
@@ -3,8 +3,19 @@
 describe Virtus::Typecast::String, '.to_integer' do
   subject { described_class.to_integer(string) }
 
-  let(:string)  { '1.0' }
-  let(:integer) { 1 }
+  { '1' => 1, '1.0' => 1, '.1' => 0 }.each do |value, expected|
+    context "with #{value.inspect}" do
+      let(:string) { value }
 
-  it { should == integer }
+      it { should be_kind_of(Integer) }
+
+      it { should eql(expected) }
+    end
+  end
+
+  context 'with an invalid integer string' do
+    let(:string) { 'non-integer' }
+
+    it { should equal(string) }
+  end
 end
diff --git a/spec/unit/virtus/typecast/string/class_methods/to_time_spec.rb b/spec/unit/virtus/typecast/string/class_methods/to_time_spec.rb
index 2d1c8a88..d854171d 100644
--- a/spec/unit/virtus/typecast/string/class_methods/to_time_spec.rb
+++ b/spec/unit/virtus/typecast/string/class_methods/to_time_spec.rb
@@ -1,7 +1,9 @@
 require 'spec_helper'
 
 describe Virtus::Typecast::String, '.to_time' do
-  subject { described_class.to_time(string) }
+  subject { object.to_time(string) }
+
+  let(:object) { described_class }
 
   shared_examples_for 'a correct time object' do
     it { should be_instance_of(Time) }
@@ -43,6 +45,6 @@
   context 'with an invalid date time string' do
     let(:string) { '2999' }
 
-    it { should == string }
+    it { should equal(string) }
   end
 end
diff --git a/virtus.gemspec b/virtus.gemspec
index cf9574cb..e04aa18b 100644
--- a/virtus.gemspec
+++ b/virtus.gemspec
@@ -128,6 +128,7 @@ Gem::Specification.new do |s|
     "spec/unit/virtus/typecast/hash/class_methods/to_date_spec.rb",
     "spec/unit/virtus/typecast/hash/class_methods/to_datetime_spec.rb",
     "spec/unit/virtus/typecast/hash/class_methods/to_time_spec.rb",
+    "spec/unit/virtus/typecast/object/class_methods/method_missing.rb",
     "spec/unit/virtus/typecast/object/class_methods/method_missing_spec.rb",
     "spec/unit/virtus/typecast/string/class_methods/to_boolean_spec.rb",
     "spec/unit/virtus/typecast/string/class_methods/to_date_spec.rb",